激光跟踪系统“鸟巢”坐标的球面标定法  

Calibration of Laser Tracking System with Spherical Constraint

作　　者：张亚娟[1] 裘祖荣[1] 李杏华[1] 杨婷[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2014年第3期255-261,共7页Journal of Tianjin University：Science and Technology

摘　　要：深入分析了激光跟踪测量系统坐标系的特点,建立了采用高精度约束球面标定激光跟踪测量系统(LTS)的初始状态参量和结构误差参量的方法.通过数学仿真搜索出采用约束球面进行系统标定时的最佳约束球半径、最佳采样点个数等,并采用仿真方法评估系统噪声对标定结果的影响.使用三坐标测量机和QC20-W高精度伸缩球杆仪建立了球面约束标定的实验装置,对激光跟踪系统执行了球面约束标定实验.实验结果表明,采用高精度约束球面作为约束条件可以提高系统的未知参数标定精度和测量精度.Coordinate system characteristics of the laser tracking system（LTS）are analysed,and a method using sphere as constraint to calibrate the initial state parameters and structure error parameters of LTS is provided. Through Matlab simulation,the optimal number of sample points,optimal radius of sphere for system calibration are ob-tained,out and the impact of system noises on the calibration results is assessed. An experimental apparatus for spherical calibration is established by using CMM and QC20-W ball bar,and experiments are carried out on this sys-tem. The results show that this method can improve the accuracy of unknown parameters and the measurement accu-racy of the system.

关 键 词：激光跟踪系统 标定 数学模型 约束球面 坐标测量 

分 类 号：TH741[机械工程—光学工程]